doap category core
doap: add <programming-language>
Visual Studio Projects: Link to libjpeg-turbo

Use the libjpeg-turbo library instead of the stock IJG JPEG library, which
is a better-maintained drop-in replacement for the IJG JPEG library, and
cuts down on the users of static C-Runtime, which the IJG JPEG library
defaults to in its build files for Visual C++.